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Promoted plugin helpers to general use

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This commit is contained in:
Abramo Bagnara 2001-01-26 09:56:30 +00:00
parent 406587a531
commit c07201926b
9 changed files with 272 additions and 236 deletions
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79
src/pcm/pcm_linear.c
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@ -30,7 +30,64 @@ typedef struct {
int sformat;
} snd_pcm_linear_t;
static void linear_transfer(const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
int snd_pcm_linear_convert_index(int src_format, int dst_format)
{
int src_endian, dst_endian, sign, src_width, dst_width;
sign = (snd_pcm_format_signed(src_format) !=
snd_pcm_format_signed(dst_format));
#ifdef SND_LITTLE_ENDIAN
src_endian = snd_pcm_format_big_endian(src_format);
dst_endian = snd_pcm_format_big_endian(dst_format);
#else
src_endian = snd_pcm_format_little_endian(src_format);
dst_endian = snd_pcm_format_little_endian(dst_format);
#endif
if (src_endian < 0)
src_endian = 0;
if (dst_endian < 0)
dst_endian = 0;
src_width = snd_pcm_format_width(src_format) / 8 - 1;
dst_width = snd_pcm_format_width(dst_format) / 8 - 1;
return src_width * 32 + src_endian * 16 + sign * 8 + dst_width * 2 + dst_endian;
}
int snd_pcm_linear_get_index(int src_format, int dst_format)
{
int sign, width, endian;
sign = (snd_pcm_format_signed(src_format) !=
snd_pcm_format_signed(dst_format));
width = snd_pcm_format_width(src_format) / 8 - 1;
#ifdef SND_LITTLE_ENDIAN
endian = snd_pcm_format_big_endian(src_format);
#else
endian = snd_pcm_format_little_endian(src_format);
#endif
if (endian < 0)
endian = 0;
return width * 4 + endian * 2 + sign;
}
int snd_pcm_linear_put_index(int src_format, int dst_format)
{
int sign, width, endian;
sign = (snd_pcm_format_signed(src_format) !=
snd_pcm_format_signed(dst_format));
width = snd_pcm_format_width(dst_format) / 8 - 1;
#ifdef SND_LITTLE_ENDIAN
endian = snd_pcm_format_big_endian(dst_format);
#else
endian = snd_pcm_format_little_endian(dst_format);
#endif
if (endian < 0)
endian = 0;
return width * 4 + endian * 2 + sign;
}
void snd_pcm_linear_convert(const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset,
const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset,
unsigned int channels, snd_pcm_uframes_t frames, int convidx)
{
@ -167,11 +224,11 @@ static int snd_pcm_linear_hw_params(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)
if (err < 0)
return err;
if (pcm->stream == SND_PCM_STREAM_PLAYBACK)
linear->conv_idx = conv_index(snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0),
linear->sformat);
linear->conv_idx = snd_pcm_linear_convert_index(snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0),
linear->sformat);
else
linear->conv_idx = conv_index(linear->sformat,
snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0));
linear->conv_idx = snd_pcm_linear_convert_index(linear->sformat,
snd_pcm_hw_param_value(params, SND_PCM_HW_PARAM_FORMAT, 0));
return 0;
}
@ -190,9 +247,9 @@ static snd_pcm_sframes_t snd_pcm_linear_write_areas(snd_pcm_t *pcm,
assert(size > 0);
while (xfer < size) {
snd_pcm_uframes_t frames = snd_pcm_mmap_playback_xfer(slave, size - xfer);
linear_transfer(areas, offset,
snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
pcm->channels, frames, linear->conv_idx);
snd_pcm_linear_convert(areas, offset,
snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
pcm->channels, frames, linear->conv_idx);
err = snd_pcm_mmap_forward(slave, frames);
if (err < 0)
break;
@ -224,9 +281,9 @@ static snd_pcm_sframes_t snd_pcm_linear_read_areas(snd_pcm_t *pcm,
assert(size > 0);
while (xfer < size) {
snd_pcm_uframes_t frames = snd_pcm_mmap_capture_xfer(slave, size - xfer);
linear_transfer(snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
areas, offset,
pcm->channels, frames, linear->conv_idx);
snd_pcm_linear_convert(snd_pcm_mmap_areas(slave), snd_pcm_mmap_offset(slave),
areas, offset,
pcm->channels, frames, linear->conv_idx);
err = snd_pcm_mmap_forward(slave, frames);
if (err < 0)
break;